Draft-equalizer



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s. & W. T. MARVIN.

DRAFT EQUALIZEB.

No. 255,527. A Patented Mar. 28,1882.

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UNITED STATES PATENT OFFICE.

STEPHEN MARVIN AND WILLIAM T. MARVIN, Oh BURNETTSVILLE, INDIANA.

DRAFT-EQUALIZER.

SPECIFICATION forming part of Letters Patent No. 255,527, dated March 28, 1882.

Application filed December 9, 1881.

To all whom it may concern Be it known that we, STEPHEN MARVIN and VVLLLIAM T. MARVIN, citizens of the United States, residing at Burnettsville, in the county of White and State of Indiana, have invented certain new and useful Improvements in Draft- Equalizers; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to the letters or figures of reference i'narked thereon, which form a part of this specification.

Our improvements relate to two-horse equalizers; and their objects are, first, to give an advantage to the weaker or slower horse; and, secondly, to dispense with stay-chains to the Whiffletree.

In the accompanyingdrawings, Figure l is a rear perspective view of a common whiffletree and wagon-pole furnished with our improvements; Fig. 2, an upper plan view of the same, and Fig. 3 a rear perspective view of so much of the whiffletree and stay-spring shown in the other figures as suffices to explain an alternative method of attaching the spring to the tree.

Like letters refer to like parts throughout the series of figures.

In these drawings, A is an ordinary doubletree, pivoted in the usual way to B, a common wagon-pole. This tree is stayed from the rear by means of C, a bowshaped metal spring, resting edgewise upon the upper side of the pole and held rigidly at its center by a looped metal plate, E, with the aid of a strong rivet or bolt,'c. D is a shorter bow-shaped re-en- (No model.)

forcing spring, likewise penetrated and held at its center by the rivet 6, but with its ends, which are slightly turned inward, free to play along the outer surface of the stay-spring.

F F are metal plates or bearings, fastened flatly to the rear of the double-tree near each end, to resist the wear from the conve-xed ends of the stay-spring as they travel to and fro along those parts of the tree.

G G are flat rectangular metal staples, which hold the ends of the stay-spring loosely against the rear ends of the double-tree, and thus keep the spring in place for its efficient working. They also serve,in combination with the coiled ends of the spring, as checks against an undue rotation ofthe double-tree, which might weaken or break the spring.

In Fig. 3, H represents one of the bearingplates attached, not flatly but staple-fashion, to the rear side of the double-tree, allowing the spring to play upon it from end to end of the staple by means of a fiat collar, 0, forming the end of the spring.

Having fully described our invention, what we claim, and desire to secure by Letters Patent, is-

Indraft-equalizers, the combination of the double-tree A, stay-spring G, re-enforcing spring 1), center plate, E, bearings It F, and staples G- G, substantially as and for the purposes described.

In testimony whereof we affix our signatures in presence of two witnesses.

. STEPHEN MARVIN.

W. T. MARVIN. Witnesses:

DAVID SHIELDS, ELI BENNETT. 

